Index: firmware/App/Services/Reservoirs.c
===================================================================
diff -u -rf3c8ef49b4bef41b606325e3db0e053a7a72d98f -rfcd12c3aa538b90a2ae19b9202bc5d847859a545
--- firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision f3c8ef49b4bef41b606325e3db0e053a7a72d98f)
+++ firmware/App/Services/Reservoirs.c	(.../Reservoirs.c)	(revision fcd12c3aa538b90a2ae19b9202bc5d847859a545)
@@ -616,6 +616,9 @@
         // Signal dialysis sub-mode to capture final volume of prior reservoir after settling.
         setFinalReservoirVolume();
 
+        // Switched the active reservoir so reset the reservoir in use timer
+        timeReservoirInUseMS = getMSTimerCount();
+
         // Reset to start state to restart drain, fill, switch process.
         state = TREATMENT_RESERVOIR_MGMT_START_STATE;
     }